CV0-004 Cloud Architecture and Design Practice Question
A cloud architect is designing a multi-tier application on a public cloud. The application must be highly available and fault-tolerant within a single region. Which three items should be included in the architecture? (Select THREE.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Deploy resources in multiple availability zones
High availability within a region requires distributing resources across availability zones, using load balancers for traffic distribution, and implementing health checks for automatic failover.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Deploy resources in multiple availability zones
Why this is correct
Availability zones are isolated within a region; using multiple provides fault isolation.
- ✓
Place a load balancer in front of the web tier
Why this is correct
A load balancer distributes traffic across healthy instances.
- ✗
Use a single instance in one availability zone
Why it's wrong here
A single instance is a single point of failure.
- ✗
Use a single database instance without replication
Why it's wrong here
A single database instance is not fault-tolerant.
- ✓
Implement health checks for all instances
Why this is correct
Health checks allow the load balancer to route traffic away from failed instances.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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